In this exercise, you’ll refactor some ES5 code into ES2015.
ES5 Map Callback
function double(arr) {
return arr.map(function(val) {
return val * 2;
});
}
JavaScript
ES2015 Arrow Functions Shorthand
Refactor the above code to use two arrow functions. Turn it into a one-liner.
/* Write an ES2015 Version */
JavaScript
Refactor the following function to use arrow functions:
Replace ALL functions with arrow functions:
function squareAndFindEvens(numbers){
var squares = numbers.map(function(num){
return num ** 2;
});
var evens = squares.filter(function(square){
return square % 2 === 0;
});
return evens;
}
JavaScript